This assessment put the annual economic impact of PRRSV on United States pork producers at 664 million dollars, expressed in 2011 dollars. It remains the primary economic impact citation for the disease and is reproduced widely across industry material.
The figure is a national aggregate of production losses and it does not describe any individual herd. What it establishes is scale: a disease at that cost across the industry justifies capital being directed at prevention, which is the premise the filtration economics rest on. The site level analysis comes from elsewhere. The financial companion to the Alonso 2013 work reported payback of 2.1 years at 150 dollars per sow and 2.8 years at 200 dollars per sow, on production differences that included an additional 1.9 pigs weaned per sow per year. Musser and Holck built a decision tool on this assessment in 2020 to carry the impact figure down to individual operations.
One qualification belongs with every use of the number. It is stated in 2011 dollars, and quoting it as a present day cost without saying so understates it by whatever inflation has occurred since. Either the dollar year should be stated or the figure should be inflated explicitly. For a producer, the more useful number is not the national aggregate at all but the cost of a break in the specific herd, calculated from that herd's own break history, herd size and production data.